The treatment of a mentally ill Queensland man who talked about killing union officials, police and his family years before he set a Brisbane bus driver on fire will be the focus of an inquest next year.
There are no issues to be resolved into Anthony O'Donohue's actions that ended the life of Manmeet Sharma, a hearing ahead of next year's inquest into Mr Sharma's death has been told.
Instead the inquest's main focus will be the treatment Mr O'Donohue received from Queensland mental health services, senior counsel assisting the coroner Rhiannon Helsen said on Thursday.
Ms Helsen said Mr O'Donohue had a lengthy mental health history and was undoubtedly suffering from a severe chronic psychotic illness when he murdered Mr Sharma on October 28, 2016.
He had both involuntary and voluntary contact with in-hospital and community mental health services from 2010, she told the Brisbane Coroners Court hearing.
Mr O'Donohue had made threats to kill himself and public sector workers like police in October 2011 and expressed a plan to "kill the maximum number of people he could" at Brisbane's Australian Services Union.
"At the time he had a hammer, box cutters and tyre lever in his possession, which he said he intended to use to harm someone," Ms Helsen said.
Ms Helsen said Mr O'Donohue rejected the idea that he had a mental illness, was resistant to treatment and difficult to manage.
In 2014 it seemed he had largely stopped taking anti-psychotic medication, although he would still fill out scripts to avoid rousing suspicion, she told the hearing.
Mr O'Donohue was discharged from the community mental health service in August 2016.
Two years later - and two months before Mr Sharma's death - Mr O'Donohue tried to make an appointment but was told "he had been closed to the service", Ms Helsen said.
"Following his discharge from the service, it seems that Mr O'Donohue's delusional and paranoid thinking continued and seemingly escalated," she told the hearing.
Mr Sharma, also known as Manmeet Alisher, was collecting passengers at Moorooka in Brisbane's south on October 28, 2016 when Mr O'Donohue boarded the bus about 9am.
Mr O'Donohue was holding the backpack containing a plastic bottle filled with diesel and petrol fuel, which he lit and threw on Mr Sharma.
The 29-year-old driver was immediately engulfed in flames, while the bus filled with thick black smoke.
Mr O'Donohue was charged with murder but later declared of unsound mind and not criminally responsible for his actions by Queensland's Mental Health Court.
That court ordered Mr O'Donohue be held in a mental health facility for at least a decade, the first time such an order had been made.
Mr Sharma's brother Amit Alisher, who travelled from India for the hearing, said outside the court that he would wait for the coroner's report to see if the system or health department was responsible.